ABC teaches children the letters of the alphabet in song, rhyme and quiz in an interesting and entertaining way. 123 covers both adding up and taking away using popular childrens nursery songs the tracks include - 1 - 5 adding one - Hickory dickory dock, When I was one, One elephant went out to play, Peter plays with one hammer. 5 - 1 taking away one, Five little men in a flying saucer, Five little ducks went swimming one day, Five currant buns in a bakers shop. 1 - 10 adding one, 1,2,345, One man went to mow, This old man. 1 - 10 taking one away, Ten green bottles. 10 - 1 taking two away, Seven little pigs, Ten little squirrels, Ten fat sausages.